body{
  background:darkgray;
}
.ul1{
  li a:focus{
    background:#E7E7E7;
  }
}
.jumbotron{
  background:url(../images/img/bg.jpg) no-repeat;
  background-size: 100% 100%;
  height:192px;
  margin-top:50px;
  .zi p{
    color:lightgray;
  }
}
